There are people that are always going to look for another person's weakness and use it against them. These people tend to be only interested in themselves and how much they stand out or can control others. They can be people that don't necessarily have physical handicaps, yet, they often have a psychological handicap where they simply don't want anyone else to stand out more than they do. And you are correct in that there are some individuals that are handicapped in both ways, physically AND pychologically. All they care about is standing out more than others.